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From Sean Busbey <bus...@cloudera.com>
Subject Re: Generated enum dollar sign in front of a symbol.
Date Wed, 08 Oct 2014 20:06:30 GMT
Hi Lukas!

Yes, this sounds like a bug please file an issue.



On Wed, Oct 8, 2014 at 2:26 PM, Lukas Steiblys <lukas@doubledutch.me> wrote:

>   I realized now that “default” is a keyword in Java and can’t be used as
> an enum value. The files were generated in python using the python Avro
> library, where “default” is not a keyword and can be used freely. I assume
> there should be a conversion somewhere in the Java Avro library, where a
> dollar sign is automatically added for enum values that are Java keywords.
> Is that actually the case? Why did it fail this time then? Should I file a
> bug?
>
> Lukas
>
>  *From:* Lukas Steiblys <lukas@doubledutch.me>
> *Sent:* Wednesday, October 8, 2014 12:06 PM
> *To:* user@avro.apache.org
> *Subject:* Generated enum dollar sign in front of a symbol.
>
>   Has anyone run into the problem where the generated java class for an
> enum has a dollar sign for one enum value?
>
> The schema {"type": "enum", "name": "ButtonTypeID", "symbols":
> ["default", "keyboard"]} generates the following class:
>
> public final class ButtonTypeID extends java.lang.Enum<ButtonTypeID> {
>   public static final ButtonTypeID default$;
>   public static final ButtonTypeID keyboard;
>   public static final org.apache.avro.Schema SCHEMA$;
>   public static ButtonTypeID[] values();
>   public static ButtonTypeID valueOf(java.lang.String);
>   public static org.apache.avro.Schema getClassSchema();
>   static {};
> }
>
> (this is what “javap ButtonTypeID.class” produces)
>
> When I try to read my data that has the “default” value for ButtonTypeID,
> I get the exception:
>
> java.lang.IllegalArgumentException: No enum constant ButtonTypeID.default
> 	at java.lang.Enum.valueOf(Enum.java:236)
> 	at org.apache.avro.specific.SpecificData.createEnum(SpecificData.java:106)
> 	at org.apache.avro.generic.GenericDatumReader.createEnum(GenericDatumReader.java:205)...
>
> Strangely, everything was working fine a day before. Where is this dollar sign coming
from?
>
> Lukas
>
>


-- 
Sean

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